Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 23    No. 10    October 2013

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Extraction of molybdenum and nickel from Ni-Mo ore by pressure acid leaching
Si-fu WANG1,2, Chang WEI1, Zhi-gan DENG1, Cun-xiong LI1, Xin-bing LI1, Jun WU1, Ming-shuang WANG1, Fan ZHANG1

1. Faculty of Metallurgical and Energy Engineering,
Kunming University of Science and Technology, Kunming 650093, China;
2. Yunnan Hualian Zinc and Indium Limited by Share Ltd., Wenshan 663701, China

Abstract:A direct hydrometallurgical route for nickel and molybdenum extraction from a nickel-molybdenum (Ni-Mo) ore using pressure acid leaching was studied. The nickel and molybdenum were extracted by acid leaching under oxygen pressure. Compared with traditional roasting methods, this hydrometallurgical method eliminates SO2 and As2O3 emission (the Ni-Mo ore containing 15%-25% S). Compared with existing alkali leaching recovery of molybdenum process, almost all the nickel and considerable molybdenum were extracted in the acid leaching process. Under oxygen pressure conditions, almost all the nickel and a substantial part of the molybdenum were dissolved into the acid leaching liquor and the other part of the molybdenum was left in the acid leach residue. The acid leach residue was further leached under alkaline (NaOH) conditions. Under optimal experimental conditions, the extraction rates nickel and molybdenum reached 97% and 96%, respectively.

 

Key words: nickel-molybdenum ore; pressure leaching; alkaline leaching; nickel; molybdenum

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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